Tire pressure indicator carried aboard a wheel

Details Tire pressure indicator carried aboard a wheel Tire pressure indicator carried aboard a wheel

1998-10-13

1999-11-09

Noori, Max

Measuring and testing

Tire, tread or roadway

Tire inflation testing installation

116 34R, B60C 2302

Patent

active

059792329

ABSTRACT:
A tire pressure indicator carried on a tire being monitored for inflation pressure. The indicator includes a housing enclosing an indicating member bearing color coding corresponding to proper inflation. Preferably, additional color coding is provided corresponding to excessive tire pressure and to low or inadequate tire pressure. The indicating member occupies a chamber having a coil spring acting on the indicating member from one direction, and air pressure from the tire acting on the indicating member from the other direction. Differential in forces acting on the indicating member move the indicating member such that the appropriate color coding is revealed through a window formed in the housing. Optionally, the pressure indicator includes a conduit enabling inflation of the tire without requiring removal of the indicator. In alternative embodiments, the novel indicator threads to a conventional filling valve, and replaces the conventional filling valve.

REFERENCES:
patent: 4539928 (1985-09-01), Todhunter et al.
patent: 5014643 (1991-05-01), Huang
patent: 5103670 (1992-04-01), Wu et al.
patent: 5503012 (1996-04-01), Rabizadeh
patent: 5569849 (1996-10-01), Cummings
patent: 5606123 (1997-02-01), Rabizadeh
patent: 5641902 (1997-06-01), Hong
patent: 5687672 (1997-11-01), Gabriel

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